OpenAI o3
Nothing here. The model returned empty. We stared at it for a while.
OpenAI o3 vs Claude Opus 4
Compare OpenAI o3 by OpenAI against Claude Opus 4 by Anthropic, in 42 community votes, claude opus 4 wins 72% of head-to-head duels, tested across 35 shared challenges. Updated April 2026.
Which is better, OpenAI o3 or Claude Opus 4?
Claude Opus 4 is the better choice overall, winning 72% of 42 blind community votes on Rival. OpenAI o3 costs $10/M input tokens vs $15/M for Claude Opus 4. Compare their real outputs side by side below.
Key Differences Between OpenAI o3 and Claude Opus 4
OpenAI o3 is made by openai while Claude Opus 4 is from anthropic. On pricing, OpenAI o3 costs $10/M input tokens vs $15/M for Claude Opus 4. In community voting, In 42 community votes, Claude Opus 4 wins 72% of head-to-head duels.
In 42 community votes, Claude Opus 4 wins 72% of head-to-head duels. OpenAI o3 leads in Reasoning, while Claude Opus 4 leads in Web Design, Image Generation. Based on blind community voting from the Rival open dataset of 42+ human preference judgments for this pair.
Web Design: Claude Opus 4 wins 72% of votes
Image Generation: Claude Opus 4 wins 86% of votes
Reasoning: OpenAI o3 wins 100% of votes
Our Verdict
Claude Opus 4Winner
OpenAI o3Runner-up
Pick Claude Opus 4. In 42 blind votes, Claude Opus 4 wins 72% of the time. That's not luck.
Pick OpenAI o3 for Reasoning. Pick Claude Opus 4 for Image Generation, Web Design.
Clear winner
Writing DNA
Style Comparison
Similarity
93%
Claude Opus 4 uses 11.2x more emoji
OpenAI o3
Claude Opus 4
68%Vocabulary64%
14wSentence Length62w
0.26Hedging0.52
0.7Bold4.4
3.0Lists9.1
0.00Emoji0.11
0.38Headings1.87
0.12Transitions0.27
Based on 16 + 16 text responses
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279 AI models invented the same fake scientist.
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